Or you could just, you know, take an average of how long it takes you to walk a known route. This seems like a solution in search of a problem, as well as another way for people to spy on me through my phone.

I figure it's only a matter of time before I start getting unsolicited updates on my sexual performance from third parties based on the amplitude, pitch and frequency of the resulting moans - full report with detailed analytics available for only $9.99.